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Corrosion Types for Aluminum Parts Used in Vehicular Applications

This new technical brief from the Aluminum Transportation Group details three different types of cosmetic corrosion and best practices for prevention.

Research Highlights

Under some conditions, however, painted or unpainted automotive aluminum can develop one of three different corrosion types:

  • Galvanic corrosion
  • Filiform corrosion
  • Crevice corrosion

In most cases, aluminum corrosion is cosmetic in nature influencing paint retention. Corrosion of aluminum is predominantly surface corrosion and does not penetrate through the thickness of the material and does not weaken the structural integrity of the part. This short communication briefly explains each corrosion type and relevant preventative measures.

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